<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card class="box-card">
      <!-- 添加角色按钮 -->
      <el-row>
        <el-button type="primary">添加角色</el-button>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列表 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1===0?'bdtop':'']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeTag(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级 三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套 渲染 二级权限 -->
                <el-row
                  :class="[i2==0?'':'bdtop']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeTag(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      v-for="(item3,i3) in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="removeTag(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre></pre>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button type="primary">编辑</el-button>
            <el-button type="danger">删除</el-button>
            <el-button type="warning" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog title="分配权限" @close="setRightsClosed" :visible.sync="dialogVisible" width="50%">
      <el-tree
        :data="rightsList"
        :props="treeProps"
        node-key="id"
        default-expand-all
        show-checkbox
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 角色列表数据
      rolesList: [],
      //分配权限对话框
      dialogVisible: false,
      rightsList: [],
      //   树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      // 默认选中节点id值
      defKeys: [],
      // 分配权限的id
      roleId: ""
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) return this.$message.error("获取失败！");
      this.rolesList = res.data;
    },
    //删除三级标签
    async removeTag(role, rightsId) {
      const result = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);

      if (result !== "confirm") {
        return this.$message.info("取消了删除！");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightsId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除失败");
      }
      console.log(res.data);
      //   将删除之后返回的数据 重新赋值给role 防止页面重新刷新
      role.children = res.data;
    },
    //分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      //   获取所有权限列表
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) return this.$message.error("获取数据失败！");
      this.rightsList = res.data;

      //  递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);
      this.dialogVisible = true;

      console.log(role);
    },
    // 通过递归的形式获取角色所有三级权限的id,并保存到defKys数组中
    getLeafKeys(node, arr) {
      console.log(node, "node");
      if (!node.children) {
        // 如果当前node节点不包含children属性，则是三级节点
        return arr.push(node.id);
      }

      node.children.forEach(item => {
        console.log(arr, "22222222222");
        this.getLeafKeys(item, arr);
      });
    },
    //监听分配权限对话框的关闭事件
    setRightsClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];

      console.log(keys);

      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );

      if(res.meta.status!==200)
      return this.$message.error('分配权限失败！')

      this.$message.success('分配成功')
      this.getRolesList()
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 10px;
}
.bdtop {
  border-top: 1px solid #ccc;
}
.bdbottom {
  border-bottom: 1px solid #ccc;
}
.vcenter {
  display: flex;
  align-items: center;
}
.el-table {
  margin-top: 20px;
}
</style>